APA
Suy E., Wellens K., . (1998). International law. The Hague: M. Nijhoff Publishers.
Chicago
Suy Eric, Wellens Karel, . 1998. International law. The Hague: M. Nijhoff Publishers.
Harvard
Suy E., Wellens K., . (1998). International law. The Hague: M. Nijhoff Publishers.
MLA
Suy Eric, Wellens Karel, . International law. The Hague: M. Nijhoff Publishers. 1998.